Police in Cumbria are investigating the deaths of babies at a hospital maternity unit.
Detectives say their inquiry includes "a number of deaths" and that it is too early to say how many more may be involved.
The police operation follows the death of nine-day-old Joshua Titcombe who was born at Furness General Hospital in Barrow in 2008.
At his inquest in June this year a coroner criticised care at the hospital accusing midwives of colluding to cover up mistakes in relation to his care.